Pump



Dec. 18, 1928'. 1,695,543

C. P. EISENHAUER PUMP.

Filed Feb. 25, -l926 5 Sheets-Sheet l 3 f/VVENTOR C harlcsf? ELscnhauer,

,1 TTORNE Vs,

D'ec, 18, 1928.

c. P. EISENHAUER PUMP Fild Feb. 25, 1926 5 Sheets-Sheet 2 IN VENTOR Dec.18, 1928.

C. P. EISENHAUER BUMP Filed Feb. 25, 1926 5 Sheets-Sheet INVENTORCharlfiSREisen/mu fi A TTORNE V4 Dec. 18, 1928. I 1,695,543 I cEISENHAUER PUMP Filed Feb. 25, 1926 5 SheetsSheet 4 TOk ,xgarles P.i$nhauan BY A TTORNE X5,

PUMP

Filed Feb. 25, 1926 5 Sheets-Shet 5 IN VEN TOR.

' 014/: as REISENHHUER, m @ZW- ATTORNEYS.

Fig.5,

Patented Dec. 18, 1928.

p v 1,695,543 UNITED STATES PATENT OFFICE CHARLES P. EISEKHAUER, O FDAYTON, OHIO, ASSIGNOR TO THE DURO COMPANY, OF

DAYTON, OHIO, CORPORATION OF OHIO. i I

PUMP.

Application filed February 25, 1926. Serial No. 90,636.

My invention relates to pumps.

It is the object of my invention 'to provide a pump which can bedirectly connected. to the driving elements, such as an electric motor.

It is my object to provide a pump which will deliver a flow of fluidcontinuously under constant pressure.

It is my object to provide a pump with a continuous suction and acontinuous discharge.

It is my object to provide a pump directly connected-to an electricmotor having a plurality of reciprocating pistons operating in aplurality of adjacent cylinders the cylin-- ders being connected to acommon suction line and a common discharge line and actuated by a commonactuating element, lubri cated from-a common source, and drained by acommon drainline, the whole construction being mounted as a unit onacommon base,

' armature shaft 3.

Journaled 111 the bearing 4 1n the end 01:

but-being detachably held together in separate units, such as the powerunit the pump unit and the discharge unit.

Referring to the drawings: Figure 1 is a. side elevation of the pump anddriving mechanism partially in section;

Figure 2 is an end elevation thereof; Figure 3 is a. section on the line33 look: ing in the direction of the arrows of Figure 1 Figure 4 is asection on the line 44 looking in the direction of the arrowsin Figure1;

Figure 5 is an enlarged section of the piston and valve mechanism shownin Figure 1. Referring to the drawings in detail, 1 is a common base forthe entire mechanism, the motor 2 being supported thereon having an Thisarmature shaft is the motor housing or cage 5 in which housing there area. plurality of apertures 6 around the armature shaft line with bushings7, sealed from the interior of the motor by the plates 8.

To this end of the cage of the motor there is bolted by the bolts 9 thepump housing 10. Access to the interior of this housing for lubricationpurposes may be had through the aperture 11 closed by the oil fillingplug 12. lVithin one part of this housing is an actuating mechanismchamber 13.

The armature shaft 3 has mounted on the outer end thereof aworm sleeve14- carrying a screw or worm 15 which transverses the and a. nut 27 onthe end of the shaft.

major axis of the piston rods 16 and piston rod guides 17, the guidesreciprocatin in the apertures 6 within the bearing sleeve The piston rodon its inner end is provided with a sleeve 18 having av slot cut in oneside as at 19 through which the worm 15 rotat-es and in doing so engageswithin the chamber 20 inside of the head 18 with a piston rod 21 with aspring pressed piston havmg a plunger rod 22 'which is guided in theforward end 23 of the piston rod guide, wh1ch is threaded within thehead at 24 formmg a cup within which seats the spring. 25 which engagesthe under side of the piston 21, thus insuring a constant yieldingengagement of the piston rod 16 and its associated parts with theactuating worm 15. 20 is a. bearing plate in the chamber 20 engaging theother side of the worm. f i

It will be noted that the sleeve 14 is con nected to the armature shaft3 by a key 26 Thus the worm is detachable for replacement and repalr.The piston rod 16 is guided in its reciprocatory movement by the sleeve28 mounted within the tubular passageway 29 which is the main cylinderfor the piston'on .the piston rod 16. This piston consists of a pair ofspaced washers 30, cup-shaped in section witli their cups oppositelydisposed, the rear cup engaging with the walls 31 of the cylinder, whichare bounded on either side by the inlet passageway 32 of the suctionline 33 and the drain line34. The forward cup engages with the walls ofthe cylinder which are bounded on one side by the inlet suction line 32and'on the other side by the outlet chamber 35 leading to the out-let ordischarge line 36. I

These cupshaped washers are spaced from one another by the sleeve 37having the platelilte shoulders 38 and 39, the latter being providcdwith passageways 40 which are closed in one direction bythc valve plate41 which is loosely mounted on the screw 42. and retained in position bythe head 43 thereof.

The head of this screw projects in an exit. passageway 35, the mouth ofwhich is sealed by a discharge valve plate 44: held in position normallyby a spring 45 carried on a sleeve 46 threaded at 47 within thedischarge line.

The rear washer 30 is embraced between the plate 38 and the plate 48which plate 48 engages a shoulder 49 on the piston rod 16.

The chamber 13 at its lower side carries lubricant above the drain plug51. The

pump casing is supported by the bracket 52 on the common base 1.Asuction drain line 53 is provided which can be drained by the plug 54at the bottom of the ump casing.

The two istons are use in order that there shall e a seal between thedriving chamber 13 and the inlet passageway 32. The piston 49accomplishes this purpose in conjunction with the piston ring or washer38.

When the piston rod'16 is withdrawn towards the ri ht hand of the view,as in Figure 1, the uid or s in the chamber 32 passes beneath the va veplate 41 and accumulates to the left hand side of the piston 39. Uponthe return of the piston rod 16 the gas or fluid in front of the piston39 is compressed, and, as a result, depresses the valve plate 44discharging into the discharge line 36. The second piston 38 serves toassist in forcing the fluid or gas in the chamber 32 out of thatchamber.

The motor shaft rotates while thepistons and piston rods reciprocate.

Method of operation.

As the electric motor rotates its armature shaft, the worm 15 willrotate and in doing so will reciprocate the respective piston rods andpistons in succession. In doing so, as it drives the piston to the righthand, the fluid behind the piston will pass through the openings 40 asthe pressure of the fluid will lift the valve plate 41. When the pistonstarts to return, the ressure of the confined fluid will seat the vave.plate 41 and lift the valve plate 44 against the spring 45discharging the fluid into the discharge line.

- flow is continuous and the suction is likewise continuous. Thus, everyturn of the motor is fruitful of results, the consumption of power issteady and there is no pounding or jerking of the system to rack thejoints and wear the machinery.

The apparatus is self lubricated and takes up the wear due to its springpressed engaging parts.

It will be understood that I desire to comprehend within my inventionsuch modifications as may be necessary to adapt it to varying conditionsand uses.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is:

1. In a pump, a common base, a motor and a pump mounted thereon, saidpump structure carrying suction and discharge lines,

said motor having its armature shaft directly connected to a pluralityof pistons working in a plurality of cylinders communicating with acommon suction line and'a common discharge line delivering fluid fromone to the other by the successive operation of the successive pistonsin the successive cylinders and independent valves for each cylinderoperated independently of each other by the fluid pressure in eachcylinder.

2. Ina pump, a motor, an operating shaft therein, a worm thereon, aplurality of piston rods engaged by said worm so that the rotarymovement of the worm is converted into the reciprocatory movement of thepiston rods, pistons thereon, hydrostatically operated valves carriedthereby, a common suction line communicating with respective cylindersof said pistons, cylinders therefor parallel to the armature shaft, acommon discharge line, valves for each of said cylinders in saiddischarge line, whereby a continuous suction and discharge is effected.

3. In a pump,a motor, an operating shaft therein, a worm thereon, a.plurality of piston rods engaged b said worm so that the rotarymovementof t- 1e worm is converted into the reciprocatory movement ofthe piston rods, pistons thereon, hydrostatically operated valvescarried thereby, a common suction line communicating with respectivecylinders of said piston-s, cylinders therefor, a common discharge line,valves for each of said cylinders in said discharge line, whereby acontinuous suction and discharge is effected, and

in said discharge line, whereby a continuous suction and discharge iseffected, and means to guide the rear end of said piston rods remotefrom the piston, and yielding means for engaging said piston rods withsaid worm to maintain the relative position thereof.

5. In a pump, a motor, an operating shaft therein, a worm thereon, aplurality of piston rods engaged by said worm so that the rotarymovement of the worm is converted into the reciprocatory movement of thepiston rods, pistons thereon, valves carried thereby, a common suctionline communicating with respective cylinders of said pistons, cylinderstherefor, a common discharge line, whereb a continuous,suction anddischarge is e fected, and means to guide the rear end of yielding meansfor engaging said piston rods with said worm to maintain the relativeposition thereof, said piston rod guides being mounted in the end frameof the motor.

6. In a pump, a source of power, an element rotated thereby, a pluralityof pistons reciprocated thereby, a plurality of cylinders.

. nected to saidcylinders and a common drain line connected to saidcylinders. and a common suction line drain.connected to said cylinders.

8. In combination, a cylinder having a drain port at the rear endthereof and a suetion portmidway thereof dividing the cylmder .into arear portion and a forward portion, and a discharge port at the forwardend thereof into a discharge line.

9. In combination, a cylinder having a 'drain'port at the rear endthereof and a suction port midway thereof dividing the cylinder into arear portion and a forward portion, and a discharge port at the forwardend thereof into a discharge line, a piston rod and piston workingtherein, said piston having spaced heads, one of which engages with arear portion of the cylinder and the other of which engages with theforward portion of the cylinder.

10. In combination, a cylinder having a drain port at the rear endthereof and a suction port midway thereof dividing the cylinder into arear portion and a forward portion, and a discharge port at the forwardend thereof into a discharge line, a piston rod and piston workingtherein, said piston having spaced heads, one of which engages with arear portion'of the cylinder and the other of which engages with theforward portion of the cylinder, and valve mechanism adapted to regulateports carried in the head working in the forward portion of thecylinder, and associated valve mechanism adapted to operate alternatelytherewith carried in a dis charge line associated with the forward endof the'cylinder.

11. In combination, a cylinder ,having a drain port at the rear endthereof and a suction port midway thereof dividing the cylinder into arearv portion and a forward portion, and a discharge port at the forwardend thereof into a discharge line. a piston rod and piston workmgthere1n,- said piston having spaced heads, one of which engages with arear portion of the cylinder and the other of which engages with theforward portion of the cylinder, and Valve mechanism adapted to regulateports carried in the head working in the forward portion of thecylinder, and associated valve mechanism adapted to operate alternatelytherewith carried in adischarge line associated with the forward end ofthe cylinder, and a guide forthe rear end of the piston rod, so-arrangedthat the drain port lies between the rear portion of the cylinder andthe guide.

12. In combination, a piston rod, a collar carrying spaced platesmounted thereon, oppositely disposed washers engaging with said sleevesand the walls of a cylinder in which thepiston rod operates, retainingplates for each of said washers, one of said washers and its retainingplates having valve apertures therethrough, a plate adapted to seal saidapertures, and means for limiting the movement of said plate.

13. In combination, a rotary driving element, a plurality ofreciprocating pumping elements driven thereby and located parallelthereto, a common suction line connected to said pumping elements, acommon discharge line connected thereto and a common. drain line. i

14. In a. pump, a rotating driving element, aworm thereon, areciprocating pumping element engaged by said Worm, a suction line and adischarge line, a valve hydrostatically operated, and yielding means toseat the valve.

15. In a pump, a rotating driving element, a worm thereon, areciprocating pumping element engaged thereby, a suction line, adischarge line, a valve hydrostatically operated, yielding means to seatsaid valve, a valve carried by the reciprocating pumping element adaptedto be moved solely by the hydrostatic pressure associated therewith.

, 16. In a pump, a rotating driving element, a worm thereon, areciprocating pumping element engaged thereby, a suction line, adischarge line, a. valve member stationarily supported in said dischargeline adapted to be moved in one direction hydrostatically and in theother direction-mechanically, yielding means for moving said valvemechanically and a moving valve element adapted to be operated solelyhydrostatically.

17. In combination. a motor unit having a rotating driving element, apump unit having a ported piston and a piston rod, :1 cylinder, atdischarge line connected to said cylinder having a valve for controllingthe discharge from the cylinder, said valve being operated by fluidpressure in the cylinder, a valve in the piston adapted to regulate theflow through the ports in the piston, a suction line connected to thepump unit, said motor unit and pump unit being'mounted on a common baseadapted to support said units, the discharge line and the suction line.

18. In combination, a motor unit, a plurality of reciprocating pumpelements consisting of piston rods and ported pistons, a plurality ofparallel cylinders therefor di's posed about the axis of the motor unit,a suction line, a discharge line, a plurality of 5 hydrostaticallyoperated valves, a portion of which are located in the discharge lineand a portion of which are carried by the pistons to control the portstherethrough, yielding means for controlling a portion of said valvemembers, the remainder of the valve members 10 being operatedhydrostatically.

In testimony whereof, I aflix my signature.

CHARLES P. EISENHAUER.

